Piston rietgr



F. G. SCO ZZAFAVA.

PISTON RING.

APPLICATION FILED JAN. 19, 192i.

Patented June 13, 1922.

Fred B. 5 c: uzza'fava awn/WWO UNITED STATES PATENT OFFICE.

FRED GABRIEL SCOZZAFAVA, F GOUVEENEUR, NEW YORK.

PISTON RING.

Application filed January 19, 16521.

To all whom it may concern:

lie it known that l, Flinn G. tloozzarxrra, a citizen of the United States, residing at (louverneur, in the county of St. Lawrence and State of New York, have invented certain new and useful TIIIPIOVGIHGIHS in li iston Rings, oi which the 'lollo'wing is a spec-L li ca tion.

This invention relates to piston rings particularly designed tor use upon the pistons ct internal combustion engines, and an object of this invention is to provide a piston ring constructed to prevent gaps therein. rendering the engine gas tight and consequently increasing the power of the engine and savinp expense in the operation thereof by permitting of the utilization oi the maniinuin explosive proclivities oi the fuel within the cylinder, and against the piston, and preventing any escape ot the exploding gases past the piston.

Another object of this invention is to provide a two-part piston ring. each section of? which is split, and one wherein the surfaces of the sections of the ring each Form substantially the entire upper and lower surface ot the ring, and also to provide means for preventing the L aps in the ring section Ermn coming in alignment with each other, which means comprises a pin carried by the inner section engageable with a suitable recess tormed in one end oi the outer section, wherein: the ends oi the outer section may he moved into ei'ig'apgcment with each other by contracting action on the ring section to permit the proper fitting or filing oi? the ends of the outer section, to cause it to properlv lit the piston upon which it is mounted.

Other objects of the invention will. appear in the following detailed description taken in connection with the accompanying drawings. forming a part oi"? this specification, and in which drawing s:

Figure 1 is a perspective view ot the improved piston ring showing the section.

Figure 2 is a section on the line 2-42 of Fisrure 1.

Figure line 3-3 Peierrinpmore particularly to the drawingzs. wherein like characters indicate like and corresponding parts throughout the several views. the improved piston ring is formed or an inner section and an outer section 6, each Formed of any suitable ma- 3 is a cross section taken on the of Figure l. and 4- is a section on the line 4-. l of? is provit Specification of Letters Patent. Patented June 13, 1922.,

Serial No. 43%,383.

terial. The inner section 5 is provided with a relatively wide base portion 7 which e);- tends throughout the entire width of the piston ring; structure and with, an upstanding; ai'inular portion t ubstantially one half the thickness or width of the ring the upper end ot which ru standin r portion is herelhid as shown at 9 terininatii'ip in a sulir-tantially sharp edge at the upper inner e li e of the piston ri. structures. The out e tion (3 with an atrnuiuo i t on l extending inwardly on iii-per edge. the inner upper surface oi which is bevelled, for snug) fitting against the bevelled surface 9 oi the upper edge of the upstanding portion 9, of the lower or inner section o. The main portion of the section (3 is of such thickness that it. together with the upstandingportion 5% of the section 5 are equal in width to the width oi the base T. as clearl shown in the drawings. Each oi: the sections 5 and 6 are split as shown at ll and 12 respe -.tively. in Figure '1 ot the drawings. and in assembling the sections in ring: formation the split 1! is positioned at one side ot the ring. while the split 12 is substantially diametrically opposite there from. The ring section (3 is prevented from moving circum'tcrentially about the inner section by a radially extendingpin 12% which is carried by the inner section 5, and is adapted to rest in a recess Formed in the end of the section 6. This recess 14 is termed in the end 15 at its lower edge, and the end 16 ot the outer section 6 oi the ring structure is provided with a straight por tion .7. adapted to correspond with the recess 1 and being of substantially the same height as the recess. thus permittingthe contracting oi the ring; section 6 until the angled portions of, the ends 15 and 16 moved into engagement with each other, without interfering with the pin 13, so as to permit the proper adjustment of the ring 6 about a piston upon which it is to be mounted. so that it necessary the angled surfaces of the ends 15 and ll) may be filed to properly pre sent these surfaces with the necessary space thorebetween to allow For the expansion ol the metal oi which the ring is made. when the engine becomes heated.

The upper edge connection between the sections 5 and 6 is such. that when the ring is attached to piston it will be near the inner surface of the groove in the piston. and the joint being; Formed of the engagement of the bevelled sections of the ring, the

A piston ring comprising inner and i tines said inner ring); in

club a base 1 ending; entirely (LCZOSS the Width of the piston Plilfl} and upstuntingg portion ha lag its un ei' ed bevelled,

a lateral extension on s d outer Tlllfl and having its under surface hevelled tor facial engage v: with the bevelled upper edge of the inner se-ztion, the upper ed of said outeisemimi extending substantially en titely across the Width oi the ring sai d inner and. outer tings being split, the facing ends of the outer ring being; bevelled, a radially extending-g pin. (itlllGd by said inner ring, said outer ring provided with a recess extending inwardly ii'om one of its lJQVt-Elltitl ends at the lower edge thereof, and being adapted to receive said radial pin therein to prevent cii'cui'nfeiential i'elatlve movement oi the inuei' and outer rings.

2. A piston ring comprising inner and outer wooperatmg I'lIlQ sections, said inner on, the u-.der sutfat-e 0t which. is bevelled or tuoial e enient Yvlill] the liievelled. un-

iotion, the lower l outer section :ht to each zenieut with the pet ede'e the inner ring; F

suzrtace and inner side of so A being; substantially at other and adan for en unis] surface of said base and outer side o t the inner section respectively, both of said ring sections being split. and. means tot retaining said rings in definite relation against relative rotation,

FRED GABRIEL SCOZZAFAVA. 

